you don't know js exercises

apB1.js

function validTime(time) {
  return time.match(/\d?\d:\d?\d/) !== null;
}

function toMinutes(time) {
  if (!validTime(time)) {
    throw 'time must be of format hh:mm';
  }

  const parts = time.split(":");

  const hours = Number.parseInt(parts[0]);
  const minutes = Number.parseInt(parts[1]);

  return hours * 60 + minutes; 
}

const dayStart = "07:30";
const dayEnd = "17:46";

function scheduleMeeting(startTime, durationMinutes) {
  const meetingStart = toMinutes(startTime);
  const meetingEnd = meetingStart + durationMinutes;
  
  const startInTime = meetingStart >= toMinutes(dayStart);
  const endInTime = meetingEnd <= toMinutes(dayEnd);

  return startInTime && endInTime;
}